Bell Technologies: 2nd async line?

[David Mason]

In article <104 at decvax.dec.com> paradis at crater.zk3.dec.com (Jim Paradis) writes:
>Anybody out there familiar with Bell Technologies/Intel SVR3.2?
>I've got such a system here, and I can't seem to get the second
>serial port to work.  The documentation says that the driver supports
>two serial ports, but the kernel as configured by default only
>supports one (/dev/tty00).  Any efforts to configure the second
>serial line fail... adding a second 'asy' line to sdevice.d/asy
>gives me "interrupt vector conflicts".

A similar problem was discussed on the net in 9/89 under ISC. 
Herewith extracts from the article that answered it the best:

|From: marc at dumbcat.UUCP (Marco S Hyman)
|Newsgroups: comp.unix.i386
|Subject: Re: com2 under 386/ix
|Date: 7 Sep 89 06:35:13 GMT
|References: <16 at nstar.UUCP> <3064 at amelia.nas.nasa.gov>
|
|In article <3064 at amelia.nas.nasa.gov> izen at cwru.cwru.edu (Steven H.
|Izen) writes:
|> To enable COM2 I added a line to cd /etc/conf/sdevice.d/asy  to make it look
|> like the following:
|> 
|> asy     Y       1       7       1       3       2f8     2ff     0       0
|> asy     Y       1       7       1       4       3f8     3ff     0       0
|> 
|>(I haven't been able to get the modem control minor device to work-the driver
|> just hangs for some unkonown reason when I use minor device 17).
|
|The third field (number of sub-devices supported by driver) must be
|changed to a 2 to enable the modem control ports.  Also, I've had problems
|depending upon the order the lines are given.  What works (with 386/ix
|2.0.2) is:
|
|asy     Y    2    7    1    4    3f8  3ff  0    0
|asy     Y    2    7    1    3    2f8  2ff  0    0
|
|After the kernel is built and you've re-booted you should have the following
|device files:
|
|crw-rw-rw-   1 root     root       3,  0 Sep  6 22:50 /dev/tty00
|crw-rw-rw-   1 root     root       3,  1 Sep  6 22:48 /dev/tty01
|crw--w--w-   1 uucp     root       3, 16 Sep  6 22:50 /dev/ttyd0
|crw-rw-rw-   1 root     root       3, 17 Sep  6 22:48 /dev/ttyd1
|--marc
|-- 
|// Marco S. Hyman
|// ...!pacbell!dumbcat!marc
--------------------
David               |      mason at oct1 (David M. Mason)
                    |      ...!ddsw1!olsa99!oct1!mason